Carlson - Vitamin D3 4000 IU (100 mcg), Immune Support, Bone Health, Muscle Health, Cholecalciferol, Vitamin D Supplements, Vitamin D3 Soft Gels, 360 SoftgelsAbout this item BONE HEALTH AND IMMUNE FUNCTION Carlson Vitamin D3 softgels are the preferred form of vitamin D that's important for promoting strong bones and supporting immune system health. SUPPORT IMMUNE HEALTH Vitamin D 4,000 IU (100 mcg) softgels helps boost our immune system and create a healthy immune balance. PROMOTE HEART AND MUSCLE HEALTH Vitamin D3 plays an important role in promoting heart function and supporting muscle health. VITAMIN D3